Remove extra ","

sql/field.cc

@@ -8268,7 +8268,7 @@ Field_bit_as_char::Field_bit_as_char(char *ptr_arg, uint32 len_arg,
                                      enum utype unireg_check_arg,
                                      const char *field_name_arg)
   :Field_bit(ptr_arg, len_arg, null_ptr_arg, null_bit_arg, 0, 0,
-             unireg_check_arg, field_name_arg),
+             unireg_check_arg, field_name_arg)
 {
   bit_len= 0;
   bytes_in_rec= (len_arg + 7) / 8;